refactor: remove optional chaining from the codebase

We are removing the optional chaining because one of our users is having issues with an old babel
version that doesn't work with optional chaining.

fix #720

src/view/window/get-window-from-el.ts

@@ -1,2 +1,7 @@
-export default (el?: Element | null): typeof window =>
-  el?.ownerDocument?.defaultView || window;
+export default (el?: Element | null): typeof window => {
+  if (el && el.ownerDocument && el.ownerDocument.defaultView) {
+    return el.ownerDocument.defaultView;
+  }
+
+  return window;
+};